GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2000 🢒 Astro - 4WD 🢒 Body and Accessories 🢒 Wiring Systems 🢒 HVAC Connector End Views

A/C Blower Motor Rear (C1)


Object Number: 35348 Size: CH

Connector Part Information
    • 12004267
    • 1-Way Female 56 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

1250

Ground

A/C Blower Motor Rear (C2)


Object Number: 309374 Size: CH

Connector Part Information
    • 02977976
    • 1-Way Female 56 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

ORN

1052

Auxiliary Blower Motor Output

A/C Compressor Clutch


Object Number: 280759 Size: CH

Connector Part Information
    • 12162017
    • 2-Way Female M/P 150 (GRY)

Pin

Wire Color

Circuit No.

Function

A

BLK

850

Ground

B

DK GRN

59

A/C Compressor Clutch Solenoid - Feed

A/C High Pressure Cut-Off Switch


Object Number: 38560 Size: CH

Connector Part Information
    • 12162438
    • 2-Way Female M/P 150 P2S (BLK)

Pin

Wire Color

Circuit No.

Function

A

DK GRN/WHT

762

A/C Request Signal

B

LT GRN

66

A/C Switch Output

A/C Low Pressure Cut-Off Switch


Object Number: 35437 Size: CH

Connector Part Information
    • 12052644
    • 2-Way Female M/P 150 (GRY)

Pin

Wire Color

Circuit No.

Function

A

BLK

850

Ground

B

DK GRN

603

A/C Refrigerant Low Pressure Cut-Off Switch Output

A/C Resistor Pack Rear


Object Number: 284534 Size: CH

Connector Part Information
    • 02977940
    • 3-Way Female 56 Series (NAT)

Pin

Wire Color

Circuit No.

Function

A

LT BLU

1072

Auxiliary Blower Resistor Output - Medium

B

ORN (2 Wires)

1052

Auxiliary Blower Motor Output

C

YEL

1176

Auxiliary Blower Motor Resistor Output - Low

A/C Switch Rear


Object Number: 73155 Size: CH

Connector Part Information
    • 12089287
    • 8-Way Female M/P 280 (NAT)

Pin

Wire Color

Circuit No.

Function

A

ORN

1052

Auxiliary Blower Motor Output

B

LT BLU

1072

Auxiliary Blower Resistor Output - Medium

C-D

--

--

Not Used

E

BLK

750

Ground

F

YEL

1176

Auxiliary Blower Resistor Output - Low

G

ORN

1932

Auxiliary HVAC Switch Feed

H

GRY

8

Instrument Panel Lamp Feed

Blower Motor Resistor and Relay Pack


Object Number: 68778 Size: CH

Connector Part Information
    • 12160746
    • 6-Way Female M/P 280 FLXLK (GRY)

Pin

Wire Color

Circuit No.

Function

A

ORN

340

Fuse Output - Battery - Type 3 Fuse

B

ORN

52

Blower Switch Output - High

C

BLK

350

Ground

D

TAN

63

Blower Switch Output - Medium 1

E

YEL

60

Blower Switch Output - Low

F

LT BLU

72

Blower Switch Output - Medium 2

Heater & A/C Control Module (C2)


Object Number: 62469 Size: CH

Connector Part Information
    • 12064998
    • 8-Way Female M/P 280 (BLK)

Pin

Wire Color

Circuit No.

Function

A

YEL

60

Blower Switch Output - Low

B

TAN

63

Blower Switch Output - Medium 1

C

LT BLU

72

Blower Switch Output - Medium 2

D

ORN

52

Blower Switch Output - High

E

BRN

141

Fuse Output - Ignition 3 - Type 3

F

LT BLU

733

Air Temperature Valve Position Sensor Signal

G

WHT

119

Mode Switch Output

H

LT GRN

66

A/C Switch Output

Heater & A/C Control Module (C3)


Object Number: 68737 Size: CH

Connector Part Information
    • 12129489
    • 3-Way Female M/P 280 FLXLK (BLK)

Pin

Wire Color

Circuit No.

Function

A

WHT

119

Mode Switch Output

B

BLK

1050

Ground

C

GRY

8

Instrument Panel Lamp Feed

Heater Blower Motor Rear (C1)


Object Number: 35348 Size: CH

Connector Part Information
    • 12004267
    • 1-Way Female 56 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

1150

Ground

Heater Blower Motor Rear (C2)


Object Number: 95764 Size: CH

Connector Part Information
    • 12040673
    • 1-Way Female 800 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

YEL

1172

Auxiliary Blower Motor Feed

Heater Control Module (C2)


Object Number: 62469 Size: CH

Connector Part Information
    • 12064998
    • 8-Way Female M/P 280 (BLK)

Pin

Wire Color

Circuit No.

Function

A

YEL

60

Blower Switch Output - Low

B

TAN

63

Blower Switch Output - Medium 1

C

LT BLU

72

Blower Switch Output - Medium 2

D

ORN

52

Blower Switch Output - High

E

BRN

141

Fuse Output - Ignition 3 - Type 3

F

LT BLU

733

Air Temperature Valve Position Sensor Signal

G

WHT

119

Mode Switch Output

H

LT GRN

66

Air Conditioning Switch Output

Heater Control Module (C3)


Object Number: 68737 Size: CH

Connector Part Information
    • 12129489
    • 3-Way Female M/P 280 FLXLK (BLK)

Pin

Wire Color

Circuit No.

Function

A

WHT

119

Mode Switch Output

B

BLK

1050

Ground

C

GRY

8

Instrument Panel Lamp Feed

Heater Resistor Pack Rear


Object Number: 284534 Size: CH

Connector Part Information
    • 12077384
    • 3-Way Female 56 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

RED

1925

Auxiliary HVAC Switch Output - Medium

B

YEL

1172

Auxiliary Blower Motor Feed

B

WHT

1924

Auxiliary HVAC Switch Output - High

C

DK BLU

1926

Auxiliary HVAC Switch Output - Low

Heater Switch Rear


Object Number: 284533 Size: CH

Connector Part Information
    • 12162066
    • 8 Way F Metri-Pack 280 Series (GRY)

Pin

Wire Color

Circuit No.

Function

A

WHT

1924

Auxiliary HVAC Switch Output - High

B

RED

1925

Auxiliary HVAC Switch Output - Medium

C

GRY/BLK

1596

Heater Water Control Solenoid Output

D

--

--

Not Used

E

BLK

750

Ground

F

DK BLU

1926

Auxiliary HVAC Switch Output - Low

G

ORN

1923

Auxiliary HVAC Switch Feed

H

GRY

8

Instrument Panel Lamp Feed

Temperature Control Actuator Motor


Object Number: 281207 Size: CH

Connector Part Information
    • 12040953
    • 6-Way Female MIC/P 100 (BLK)

Pin

Wire Color

Circuit No.

Function

5-6

--

--

Not Used

7

BLK

1050

Ground

8

LT BLU

733

Air Temperature Valve Position Sensor Signal

9

--

--

Not Used

10

BRN

141

Fuse Output - Ignition 3 - Type 3

Water Bypass Valve Solenoid


Object Number: 35437 Size: CH

Connector Part Information
    • 12052641
    • 2-Way Female M/P 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

GRY/BLK

1596

Heater Water Control Solenoid Output

B

BLK

850

Ground